how to use num2str on print?

hello, so I'm trying to print an image, but this image run several times with different values of two parameters (alpha and p). What I want is that matlab print all of this images with their parameters values with different names. I tried to do this:

print (strcat('Densidades Promedio.', 'alpha='num2str (alpha),'. p='num2str(p)), '-dpng')

but then it gave me an error: "Unexpected MATLAB expression". Any idea about how to do it? thank you

Answer 1

[Image Analyst]

You don't have a comma before the num2str(). Anyway, try it like this (it's more robust):

baseFileName = sprintf('Densidades Promedio.alpha=%f. p=%f', alpha, p)
% What - no extension???
fullFileName = fullfile(pwd, baseFileName);
if exist(fullFileName, 'file')
  print(fullFileName);
else
  message = sprintf('File not found:\n%s', fullFileName);
  uiwait(warndlg(message));
end

[Beatriz Sanchez]

thanks, but it does not worked, either my option nor yours. It always gave me the message "file not found" every tim and does not save the image. My way does not save the image either.

[Image Analyst]

Then the file does not exist by that exact filename. Check it character for character, including spaces, dots, etc. and whether or not the filename has an extension.

[Beatriz Sanchez]

but the file does not exist, because what I'm trying to do with 'print' is to create it, right?

[Stephen23]

@Beatriz Sanchez: please show the complete error message. This means all of the red text.

[Image Analyst]

I didn't really look into the print part before, but what exactly are you trying to print()? I don't see a use case for print() in the help where it takes only a filename. Do you want to print the current figure? Try passing in a figure handle. Or you want to print something else?

[Beatriz Sanchez]

thank you very much for your answer, it turns out that the file where I was trying to save the image was damage and for that reason it didn't worked.